package cn.tedu.sp06.fallback;

import cn.tedu.web.util.JsonResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;

import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;


import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

@Component
@Slf4j
public class OrderServiceFallback implements FallbackProvider {
    @Override
    public String getRoute() {
        return "order-service";
    }

    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
        return response();
    }
    private ClientHttpResponse response(){
        return new ClientHttpResponse() {
            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR.value();
            }

            @Override
            public String getStatusText() throws IOException {
                return HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase();
            }

            @Override
            public void close() {

            }

            @Override
            public HttpHeaders getHeaders(){
                HttpHeaders headers = new HttpHeaders();
                headers.set("content-type","application/json;charset=UTF-8");
                return headers;
            }

            @Override
            public InputStream getBody() throws IOException {
                log.info("fallback body");
                String s = JsonResult.err().code(500).msg("后台服务错误").toString();
                return new ByteArrayInputStream(s.getBytes("UTF-8"));
            }
        };
    }
}
